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Industry

Transportation

Transportationan aerial view of a factory with a lot of smoke

Paving the Road to Safer and Smarter Mobility

Safety in how we move people and products in a changing economy is central to the health and stability of the public. At Twining, we offer a comprehensive suite of services to ensure the safety and reliability of public works, transportation, and infrastructure projects. In an increasingly interconnected world, the efficiency and security of transportation networks are vital. We understand the importance of delivering exceptional project solutions tailored to the unique demands of the transportation industry. Our experienced team is committed to helping you maintain the highest standards, enhance safety protocols, and optimize your transportation construction project.

Explore our range of services that will produce confidence in the traveling public and with authorities having jurisdiction in transit systems to deliver an efficient, secure, and sustainable project. With us by your side, you can navigate the world of transportation with assurance and excellence in engineering.

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Transportation

The transportation industry is much more than getting from point A to B; it’s about doing so safely, efficiently, and sustainably. Twining plays a pivotal role in this equation, providing engineering services that cover everything from material testing to quality assurance and special inspections. We bring more than a century of experience to ensure that transportation systems are built to last and designed to evolve.

Safety Assurance

Cutting-edge technologies and methodologies are employed to help identify potential safety hazards in transportation projects. Our proactive approach minimizes accidents and liabilities, enhancing the safety of motorists, pedestrians, and public transportation users.

Regulatory Compliance & Sustainability

Twining supports sustainable practices, uses eco-friendly materials, and helps you adhere to environmental regulations and industry standards to avoid costly legal disputes and fines.

Efficient Project Delivery

Twining's years of expertise and experience in handling projects across various industries allow us to manage project timelines and allocate resources efficiently, reducing delays and minimizing disruptions to the public.

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Completed Projects

Featured Project

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Mokelumne Bicycle and Pedestrian Overcrossing Project
This Contra Costa Transportation Authority (CCTA) project consists of constructing a bridge spanning Highway 4 in Brentwood. The bridge closes a gap in a trail that was created when the highway was expanded. It provides safe access for both cyclists and pedestrians for commuting and recreational travel. Construction began in March 2022 and is anticipated to be completed in early 2023.
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Mokelumne Bicycle and Pedestrian Overcrossing Project
Almond Grove Street Rehabilitation
The Almond Grove Project consists of a multi-phase project that rehabilitates a historic neighborhood in the Town of Los Gatos. The first phase included the rehabilitation of Broadway (between West Main Street and South Santa Cruz Avenue), and Bachman Avenue (between Glen Ridge Avenue and North Santa Cruz Avenue).
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Almond Grove Street Rehabilitation
County of Sacramento, SMF Cargo Apron Expansion
This project will consist of the rehabilitation and expansion of the air cargo parking area north of existing Cargo 1, and the increase of the wide-body aircraft parking capacity at Cargo 1 from one to four aircrafts. It also includes taxiway edge light and guidance sign modifications, drainage improvements, new pavement markings, high mast apron lighting, and geometric revisions to the taxiway connection to Taxiway A to meet Federal Aviation Administration (FAA) Standards and other incidental work.
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County of Sacramento, SMF Cargo Apron Expansion
City of Riverside, Citywide Pavement Coring for Street Maintenance Improvements FY21-22
Twining provided Geotechnical Engineering Services for the City of Riverside’s Citywide Pavement Coring Street Maintenance Improvements for Fiscal Year 2021/22. Our scope of work included:
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City of Riverside, Citywide Pavement Coring for Street Maintenance Improvements FY21-22
Mojave Air and Space Port, Taxiway ‘C’ Pavement Rehabilitation
Taxiway ‘C’ is the only full-length parallel taxiway to Runway 8-26 at the Mojave Air and Space Port, located in the City of Mojave. It consists of asphalt and is roughly 7,200 feet long with portions ranging from 50 to 80 feet in width. The taxiway required a pavement rehabilitation due to its level of deterioration.
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Mojave Air and Space Port, Taxiway ‘C’ Pavement Rehabilitation
SDCRAA, Rehab Runway 9-27 & Cross Taxiways
This project included the $23 million asphalt rehabilitation San Diego International Airport, which is the busiest single-runway commercial airports in the nation. Jointly funded by San Diego County Regional Airport Authority and the Federal Aviation Administration, the overall scope included the milling and replacing of approximately 2.5 million square feet of asphalt concrete pavement, reconstruction of a new taxiway, upgrading of lighting and signage, and new striping and marking on the airport’s 9,400 x 200-foot runway 9-27 and cross taxiways B1, B4-B7, and C3.
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SDCRAA, Rehab Runway 9-27 & Cross Taxiways
San Diego International Airport, Additional Fuel Storage Tanks
This project consists of expanding the existing fuel farm located at San Diego International Airport. Three new tanks are being constructed and are approximately 58 ft in diameter and 58 ft tall. The surrounding containment area is comprised of a gravel surface with a linear beneath isolating the containment area from surrounding surfaces and soils.
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San Diego International Airport, Additional Fuel Storage Tanks
City of Long Beach, Shoemaker Bridge
The existing Shoemaker Bridge is an extension of Shoreline Drive in Long Beach that traverses the Los Angeles River. The bridge will be replaced with a new bridge approximately 100 feet south of the existing bridge. The City of Long Beach (City) is the lead/contracting agency for this bridge replacement project.
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City of Long Beach, Shoemaker Bridge
City of San Diego, Slurry Seal
This project consists of the placement of rubber polymer modified slurry (RPMS), crack sealing, removal of humps & pavement irregularities, asphalt mill and pave, and digouts, pavement base repairs, milling and disposal of pavement fabric, replacing traffic signal detection loops and stub outs, adjusting existing City manhole frames and covers to grade, raising appurtenances to grade (water, sewer), raising survey monuments to grade, reconstructing survey monument boxes, street and sidewalk sweeping, removal and replacement of existing thermoplastic striping and markings/legends, traffic control drawings & permits, weed abatement, storm drain inlet protection, installation of inlet markings, sediment control, and possible night and weekend work.
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City of San Diego, Slurry Seal
RCTC, Riverside Downtown Metrolink Station Layover Facility Expansion
This project will expand the Metrolink train layover facility at the Riverside-Downtown Station to provide space more trains to be housed at the station at the end of each night shift, which will allow for more efficient service.
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RCTC, Riverside Downtown Metrolink Station Layover Facility Expansion
City of Santa Clarita, Newhall Road Ranch Bridge Widening
The project widened the Newhall Ranch Road bridge over San Francisquito Creek by approximately 70.6 feet to improve vehicle, pedestrian, and bicyclist capacity and safety. The expansion provided eight through lanes (four lanes in each direction) on Newhall Ranch Road between Avenue Tibbitts/Dickason Drive and McBean Parkway.
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City of Santa Clarita, Newhall Road Ranch Bridge Widening
Caltrans 09-367404 SR-14 CRCP in Kern County
This project rehabilitates the existing State Route 14 (SR-14) and the associated on/off ramps and adjacent shoulders while upgrading the guardrail, traffic loop detectors, and roadside facilities. This project takes place throughout Kern County and near Rosamond and Mojave from 1.4 miles south of Dawn Road overcrossing to 0.5 mile north Of Silver Queen Road overcrossing.
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Caltrans 09-367404 SR-14 CRCP in Kern County
CT 08-347704, SR-58 Kramer Junction Expressway
The $200 million joint federally- and state-funded State Route 58 (SR-58) Kramer Junction Expressway project widened a 7.5-mile portion of SR-58 from a two-lane conventional highway to a four-lane divided expressway in the high desert region of northern San Bernardino County. In addition, the project replaced the at-grade intersection between U.S.
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CT 08-347704, SR-58 Kramer Junction Expressway
City of Santa Clarita, Overlay and Slurry Seal Program
Twining has held the Annual Overlay and Slurry Seal contract with the City for multiple fiscal years. Twining performs construction materials testing and inspection at various project sites and the batch plant. Our firm performs mix design verification and laboratory testing.
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City of Santa Clarita, Overlay and Slurry Seal Program
LA Metro, Airport Metro Connector (AMC)
This two-year $478-million Los Angeles County Metropolitan Authority (LACMTA) project aims to reduce traffic congestion to the busy Los Angeles International Airport (LAX) by providing users with better public transportation options. The new connector will allow riders to transfer efficiently from the airport the Metro network.
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LA Metro, Airport Metro Connector (AMC)
Metro, Purple Line Extension Section 3 Tunnels Project
Section 3 of the Purple Line Extension Transit Project will add 2.56 miles of new rail to Metro’s Rail system and connect downtown Los Angeles to the Westside. The two new stations will be added at Wilshire/Westwood and on the U.S. Department of Veterans Affairs property.
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Metro, Purple Line Extension Section 3 Tunnels Project
LA Metro, I-5 N HOV & Truck Lane Enhancements
This Los Angeles County Metro project aims to reduce traffic congestion in the northern LA/Santa Clarita area of the I-5 freeway by adding carpool lanes and more space for trucks.
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LA Metro, I-5 N HOV & Truck Lane Enhancements
LAWA, Specialty Staff and Materials Testing On-Call
The Los Angeles World Airports (LAWA) is the airport authority that owns both Los Angeles International Airport (LAX) and Van Nuys Airport (VNY). Of these two, LAX, is considered the 3rd busiest airport in the world and the United States. Handling over 60 million passengers a year. This project consists various projects at LAX and VNY.
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LAWA, Specialty Staff and Materials Testing On-Call

No matter your industry, Twining Inc. brings unparalleled expertise, a long-standing legacy of excellence, and a comprehensive range of services tailored to meet your specific needs.

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